How to swap a number of the values between 2 columns in Matlab

Question

I have a matrix with the size of 10x100. How can I swap the values between column 1 and column 10 in the first 40% of the rows?

Answer 1

You can use:

A = rand(10,100);

A(round(1:0.4*size(A,1)),[1,10]) = A(round(1:0.4*size(A,1)),[10,1]);